trimetal rivets,trimetal contacts face material:Ag,AgNi,AgCdO,AgSn02,AgSnO2In03,AgZnO ... :Cu and CuNi Our company provides all sizes of silver rivets, silver contacts and the base material of the product is ... electric (indicator, regulator, starter, buzzer)AgSnO2In2o3 used in switches Trimetal rivets(trimetal contacts)